Self-cleaning harrow.



B. HESTNESS. {SELF CLEANING HARROW. APPLICATION man Nov. 20, 1916.

ii. $QW v Patented Dec. H, 1917.

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B. HESTNESS SELF CLEANING HARROW. APPLICATION mm NOV. 20. I916.-

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. smuvr nns'rnnss, osnoivanne, ALBERTA, CANADA.

SELECLEANING nannow.

To all whom it may concern:

Be it known that I, BERNT HnsTNEss, a subject of the King of GreatBritain, and resident of Donalda, in the Province-of Alberta, Dominionof Canada, have invented certain new and useful Improvements inSelf-Cleaning Harrows, of which the fol.- lowing is a specification TThis invention relates to improvements in harrows and the obj ects ofthe invention are to render the harrow self cleaning, to facilitateadjusting the teeth of the harrow, and generally to adapt the severalparts to better perform the functions required of them.

With the above and other objects in view, the invention consistsessentially of the improved construction particularly described and setforth in the following specification and accompanying drawings formingpart of the same.

In the drawings,

Figure 1 is a perspective view of one section of the harrow.

.Fig. 2 is a longitudinal section of the complete machine.

Fig. 3 is a longitudinal section of one of the sections of the harrow.

Fig. 4 is a transverse section through the center member of one of theharrow sections.

Fig. 5 is a fragmentary longitudinal section of the center member of theharrow section.

Fig. 6'is a fragmentary end view of the harrow.

Like characters of reference refer to like parts in the-several figures.

Referring to the drawings, A represents the harrow comprising the sill10 to the forward end of which the beam 11 is at-.

tached, while the rear end issupported by the ground wheels 12 rotatablymounted on the axle 13.

Operatively mounted on the sill 10 above the axle 13 is a driver seat14, while intermediate of the sills standards 15 are provided carryingtransverse beams 16 from which the pulleys 17 are rotatably supported,while below the sill a transversely eX- tending shaft 18 is rotatablymounted carrying a plurality of pulleys 19 the object of which will bemade clear hereafter.

A rectangular frame 20 is operatively connected to the beam 10 by.chains 21, the

Spe c ificationof Lettersratent. P mmm 19 M, 191% Application filedNovember 20, 1916. Serial No. 132,491.

said frame being constructedof angle iron members 22 and 23, the latterof which are connected intermediate of their length by a pair of spacedchannels 24.

Transversely extending spmdle's 25 are j ournaled in the members 22 and24 and are provided with cams 26 located between the spaced channels 24while between the members 22 and 24 teeth 27 are provided having thebosses 30 rigidly mounted on the said spindles.

(Jo-acting with the cams 25 are tappets 31 pivotally mounted to theguide member 32 slidably mounted on the upper face of the channel 24 andretained in position by the guard members 33, the lower end of thetappets engaging with the cams while the upper ends are pivotallyattached to the rod 34, the front of which is connected by a spring 35to the frame 20, the rear of the rod being connected to the flexiblemember 36 which passes around the pulleys 19 and 17 and is connected toa foot rest 37 in front of the driver seat 14.

The guide member 32 is capable of longi tudinal adjustment and to thisend I provide a lever 38 pivotally mounted to the channel member 24 andconnected intermediate of its length to the guide member 32, the saidlever being provided with a detent 39 coacting with the quadrant 40mountedin the frame 20.

The assembly of the several parts will be readily understood from theforegoing description.

When the harrow is in use, horse traction is attached to the beam 11 andduring the forward motion of the machine the teeth 27 pulverize theground.

It is understood that rubbish will collect on the teeth during thisoperation and When the driver desires to clean the teeth he appliespressure to the foot rest 37, the motion being transmitted through theflexible member 36 to the rod 34 which is displaced longitudinallypermitting the lower end of the tappets 31 to be disengaged from the cam26, thereby allowing the spindles 25 to rotate so that fresh teeth 27engage the ground and the rubbish collected by the other teeth is leftin wind-rows.

Should it be found advisable at any time to alter the inclination of theteeth 27 this may be done by actuating the lever 38 and adjusting theposition of the guide member 32 so that the tappets 31 Will be engagedWith the cams at a diiferent position 'dur- .ing the rotation of thespindles 25.

From this description'it Will be seen that I have invented a harrowwhich can be advantageously utilized by farmers and in which the teethare self cleaning, the arrangement being such that the rubbish col Istructed Without departing from the spirit or scope thereof, it

is intended that allmatter'contained in the accompanying specificationand drawings shall be interpreted as illustrative and not in a limitingsense.

What I claim. as my invention is:

A harrow of the class described comprisinga frame, spindles rotatablymounted in the-frame, teeth on the spindles, cams on the spindles, guidemeans located above the said cams, tappets carried by the guide meansand means for actuating the tappets comprising a reciprocating rodengaging said tappets,.a depressible member, a flexible connectionbetween the member and the rod, and a spring for maintaining the rod ina normally operative position.

In Witness whereof I have hereunto set my hand in the presence of twoWitnesses.

- BERNT HESTNESS.

W'itnesses:

S. STERNS, O. M. VIKSE.

Copies-of tl is patent may be obtaine d: for five cents each, byaddressing the "Commissioner of Patents,

' Washington, D. G.

